{"id":"https://openalex.org/W4241609020","doi":"https://doi.org/10.1103/physrev.134.b1079","title":"Elastic Scattering of Negative Pions on Protons in the Energy Range 500-1000 MeV","display_name":"Elastic Scattering of Negative Pions on Protons in the Energy Range 500-1000 MeV","publication_year":1964,"publication_date":"1964-06-08","ids":{"openalex":"https://openalex.org/W4241609020","doi":"https://doi.org/10.1103/physrev.134.b1079"},"language":"en","primary_location":{"id":"doi:10.1103/physrev.134.b1079","doi":"https://doi.org/10.1103/physrev.134.b1079","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrev.134.b1079","pdf_url":null,"source":{"id":"https://openalex.org/S54862371","display_name":"Physical Review","issn_l":"0031-899X","issn":["0031-899X","1536-6065"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://escholarship.org/content/qt3xh7r48d/qt3xh7r48d.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5010297342","display_name":"Jerome A. Helland","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jerome A. Helland","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5086128438","display_name":"Calvin D. Wood","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Calvin D. Wood","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109989928","display_name":"Thomas J. Devlin","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Thomas J. Devlin","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036760597","display_name":"Donald E. Hagge","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Donald E. Hagge","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5062523842","display_name":"M. J. Longo","orcid":"https://orcid.org/0000-0002-5762-8670","observed_orcids":["https://orcid.org/0000-0002-5762-8670"]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Michael J. Longo","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110432809","display_name":"Burton J. Moyer","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Burton J. Moyer","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5113432052","display_name":"V. Perez-Mendez","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I148283060","display_name":"Lawrence Berkeley National Laboratory","ror":"https://ror.org/02jbv0t02","country_code":"US","type":"facility","lineage":["https://openalex.org/I1330989302","https://openalex.org/I148283060","https://openalex.org/I39565521"]},{"id":"https://openalex.org/I95457486","display_name":"University of California, Berkeley","ror":"https://ror.org/01an7q238","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Victor Perez-Mendez","raw_affiliation_strings":["Lawrence Radiation Laboratory, University of California, Berkeley, California"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Lawrence Radiation Laboratory, University of California, Berkeley, California","institution_ids":["https://openalex.org/I148283060","https://openalex.org/I95457486"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":8.8074,"has_fulltext":true,"cited_by_count":67,"citation_normalized_percentile":{"value":0.98256698,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":"134","issue":"5B","first_page":"B1079","last_page":"B1086"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10224","display_name":"Quantum Chromodynamics and Particle Interactions","score":0.8398000001907349,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10224","display_name":"Quantum Chromodynamics and Particle Interactions","score":0.8398000001907349,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10048","display_name":"Particle physics theoretical and experimental studies","score":0.0786999985575676,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10093","display_name":"Nuclear physics research studies","score":0.06530000269412994,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/differential-cross-section","display_name":"differential cross section","score":0.875},{"id":"https://openalex.org/keywords/total-elastic-cross-section","display_name":"total elastic cross section","score":0.7870000004768372},{"id":"https://openalex.org/keywords/pion-nucleon-scattering","display_name":"pion-nucleon scattering","score":0.5609999895095825},{"id":"https://openalex.org/keywords/regge-poles","display_name":"Regge poles","score":0.6600000262260437},{"id":"https://openalex.org/keywords/inelastic-processes","display_name":"inelastic processes","score":0.546999990940094}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.8440343737602234},{"id":"https://openalex.org/C206094082","wikidata":"https://www.wikidata.org/wiki/Q4097","display_name":"Pion","level":2,"score":0.6911226511001587},{"id":"https://openalex.org/C1924353","wikidata":"https://www.wikidata.org/wiki/Q1042929","display_name":"Elastic scattering","level":3,"score":0.5865713953971863},{"id":"https://openalex.org/C200006409","wikidata":"https://www.wikidata.org/wiki/Q102742","display_name":"Meson","level":2,"score":0.5700055360794067},{"id":"https://openalex.org/C2776453170","wikidata":"https://www.wikidata.org/wiki/Q7140398","display_name":"Partial wave analysis","level":3,"score":0.5586592555046082},{"id":"https://openalex.org/C184779094","wikidata":"https://www.wikidata.org/wiki/Q26383","display_name":"Atomic physics","level":1,"score":0.5401827692985535},{"id":"https://openalex.org/C191486275","wikidata":"https://www.wikidata.org/wiki/Q210028","display_name":"Scattering","level":2,"score":0.5121309757232666},{"id":"https://openalex.org/C135889238","wikidata":"https://www.wikidata.org/wiki/Q46276","display_name":"Kinetic energy","level":2,"score":0.5081725120544434},{"id":"https://openalex.org/C139210041","wikidata":"https://www.wikidata.org/wiki/Q2145840","display_name":"Resonance (particle physics)","level":2,"score":0.4706665277481079},{"id":"https://openalex.org/C186370098","wikidata":"https://www.wikidata.org/wiki/Q442787","display_name":"Energy (signal processing)","level":2,"score":0.4594936668872833},{"id":"https://openalex.org/C180205008","wikidata":"https://www.wikidata.org/wiki/Q159190","display_name":"Amplitude","level":2,"score":0.41928359866142273},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.2926073670387268},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.22084897756576538}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1103/physrev.134.b1079","doi":"https://doi.org/10.1103/physrev.134.b1079","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrev.134.b1079","pdf_url":null,"source":{"id":"https://openalex.org/S54862371","display_name":"Physical Review","issn_l":"0031-899X","issn":["0031-899X","1536-6065"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review","raw_type":"journal-article"},{"id":"pmh:oai:escholarship.org/ark:/13030/qt3xh7r48d","doi":null,"is_oa":true,"landing_page_url":"https://escholarship.org/uc/item/3xh7r48d","pdf_url":"https://escholarship.org/content/qt3xh7r48d/qt3xh7r48d.pdf","source":{"id":"https://openalex.org/S4306400115","display_name":"eScholarship (California Digital Library)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I2801248553","host_organization_name":"California Digital Library","host_organization_lineage":["https://openalex.org/I2801248553"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"article"},{"id":"pmh:qt3xh7r48d","doi":null,"is_oa":false,"landing_page_url":"http://www.escholarship.org/uc/item/3xh7r48d","pdf_url":null,"source":{"id":"https://openalex.org/S4306400115","display_name":"eScholarship (California Digital Library)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I2801248553","host_organization_name":"California Digital Library","host_organization_lineage":["https://openalex.org/I2801248553"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Helland, Jerome A.; Wood, Calvin D.; Devlin, Thomas J.; Hagge, Donald. E.; Longo, Michael J.; Mover, Burton J.; \u00c2\u00a0et al.(1963). ELASTIC SCATTERING OF NEGATIVE PIONS ON PROTONS IN THE ENERGY RANGE 500 TO 1000 MeV. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/3xh7r48d","raw_type":"article"}],"best_oa_location":{"id":"pmh:oai:escholarship.org/ark:/13030/qt3xh7r48d","doi":null,"is_oa":true,"landing_page_url":"https://escholarship.org/uc/item/3xh7r48d","pdf_url":"https://escholarship.org/content/qt3xh7r48d/qt3xh7r48d.pdf","source":{"id":"https://openalex.org/S4306400115","display_name":"eScholarship (California Digital Library)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I2801248553","host_organization_name":"California Digital Library","host_organization_lineage":["https://openalex.org/I2801248553"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W4241609020.pdf","grobid_xml":"https://content.openalex.org/works/W4241609020.grobid-xml"},"referenced_works_count":19,"referenced_works":["https://openalex.org/W25793162","https://openalex.org/W1995346640","https://openalex.org/W2002680305","https://openalex.org/W2008624602","https://openalex.org/W2008635322","https://openalex.org/W2015334073","https://openalex.org/W2026499966","https://openalex.org/W2033382025","https://openalex.org/W2038809959","https://openalex.org/W2041138352","https://openalex.org/W2043523545","https://openalex.org/W2053518495","https://openalex.org/W2054270559","https://openalex.org/W2057339870","https://openalex.org/W2072837575","https://openalex.org/W2078999466","https://openalex.org/W2094648691","https://openalex.org/W2325275550","https://openalex.org/W2803519387"],"related_works":["https://openalex.org/W2008624602","https://openalex.org/W2024613869","https://openalex.org/W2041409497","https://openalex.org/W1575258601","https://openalex.org/W2041138352","https://openalex.org/W2273050806","https://openalex.org/W2029063629","https://openalex.org/W3088856300","https://openalex.org/W2280814793","https://openalex.org/W2044767116"],"abstract_inverted_index":{"Differential":[0],"cross":[1,53],"sections":[2,54],"for":[3,55,126],"the":[4,17,26,43,46,62,68,75,92,98,101,118,124,137,146,156,169,172,179,187,195,206,213],"elastic":[5,52,143],"scattering":[6,48,119],"of":[7,25,45,67,91,94,100,109,171,181],"negative":[8],"pi":[9],"mesons":[10],"on":[11],"protons":[12],"(${\\ensuremath{\\pi}}^{\\ensuremath{-}}\\ensuremath{-}p\\ensuremath{\\rightarrow}{\\ensuremath{\\pi}}^{\\ensuremath{-}}\\ensuremath{-}p$)":[13],"were":[14,35,57],"measured":[15],"at":[16,20,120],"Berkeley":[18],"Bevatron":[19],"five":[21],"laboratory":[22,78],"kinetic":[23,79],"energies":[24],"pion":[27,77],"between":[28],"500":[29],"and":[30,50,111,155,209],"1000":[31],"MeV.":[32],"The":[33,65],"results":[34,188],"least-squares":[36],"fitted":[37,63],"with":[38,152,191,205],"a":[39,85,88,107],"power":[40],"series":[41,70],"in":[42,97,117,145,194,212],"cosine":[44,69],"center-of-mass":[47],"angle,":[49],"total":[51,215],"${\\ensuremath{\\pi}}^{\\ensuremath{-}}\\ensuremath{-}p\\ensuremath{\\rightarrow}{\\ensuremath{\\pi}}^{\\ensuremath{-}}\\ensuremath{-}p$":[56],"obtained":[58],"by":[59,163],"integrating":[60],"under":[61],"curves.":[64],"coefficients":[66,125,173],"are":[71,130,189],"shown":[72],"plotted":[73],"versus":[74],"incident":[76],"energy.":[80],"These":[81],"curves":[82,217],"display":[83],"as":[84],"striking":[86],"feature":[87],"large":[89],"value":[90],"coefficient":[93],"${{cos}^{5}\\ensuremath{\\theta}}^{*}$":[95,129],"peaking":[96],"vicinity":[99],"900-MeV":[102],"resonance.":[103],"This":[104],"implies":[105],"that":[106,136],"superposition":[108],"${F}_{\\frac{5}{2}}$":[110,138],"${D}_{\\frac{5}{2}}$":[112,157],"partial":[113],"waves":[114],"is":[115,135,218],"prominent":[116],"this":[121],"energy,":[122],"since":[123],"terms":[127],"above":[128],"negligible.":[131],"One":[132],"possible":[133],"explanation":[134],"enhancement":[139,193],"comes":[140],"from":[141],"an":[142,192],"resonance":[144],"isotopic":[147],"spin":[148],"$T=\\frac{1}{2}$":[149],"state,":[150,185],"consistent":[151],"Regge-pole":[153],"formalism,":[154],"partial-wave":[158,184],"state":[159],"may":[160],"be":[161],"enhanced":[162],"inelastic":[164],"processes.":[165],"At":[166],"600":[167],"MeV":[168],"values":[170],"do":[174],"not":[175],"seem":[176],"to":[177],"demand":[178],"prominence":[180],"any":[182],"single":[183],"although":[186],"compatible":[190],"$J=\\frac{3}{2}$":[196],"amplitude.":[197],"A":[198],"table":[199],"listing":[200],"quantum":[201],"numbers":[202],"plausibly":[203],"associated":[204],"various":[207],"peaks":[208],"\"shoulders\"":[210],"seen":[211],"${\\ensuremath{\\pi}}^{\\ifmmode\\pm\\else\\textpm\\fi{}}\\ensuremath{-}p$":[214],"cross-section":[216],"presented.":[219]},"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2026-09-22T06:50:58.402377","created_date":"2022-05-12T00:00:00"}